pulseaudio-equalizer 1:11.1-1ubuntu5 (amd64 binary) in ubuntu bionic

 PulseAudio, previously known as Polypaudio, is a sound server for POSIX and
 WIN32 systems. It is a drop in replacement for the ESD sound server with
 much better latency, mixing/re-sampling quality and overall architecture.
 .
 This package provides an equalizer sink and an interface to configure the
 equalizer, qpaeq.
 .
 The module is called module-equalizer-sink.